This "Fat loss" monitor, really monitors body fat percentages. Well I guess it can be a fat loss monitor then. Anyways these are ideal for monitoring your gains and losses in yourpursuit of fitness. The reason being is that the amount of fat that you have on your body is what determines yoour overall health and fitness. Not how much you weigh. To quote the great Al Bundy, "It's not the dress that makes you look fat. It's the fat that makes you look fat.